package src;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

/**
 * @program: javaSource
 * @description: 测试
 * @author: dong.chang
 * @create: 2021-04-15 17:49
 **/
public class test {
    public static void main(String[] args) {
        HashMap<Object, Object> map = new HashMap<>();
        map.put("a", "a");
        System.out.println(map);

        List<Object> list = new ArrayList<>();
        list.add(1);
        list.add(1);
        list.add(1);
        list.add(1);
        list.add(1);

    }
}
